Copolymerization of styrene (St) and different ratios of Cinnamaldehyde (Cin) from cinnamon oil and synthetic cinnamaldehyde were carried out by free radical polymerization, and were characterized by Fourier Transform Infrared (FTIR) spectroscopy, Thermo Gravimetric Analysis (TGA), Differential Scanning Calorimetric (DSC) analysis, and Gel Permeation Chromatography (GPC). Photodegradation of cinnamaldehyde incorporated copolymer (Poly (St-co-Cin)) films have been studied at outdoor weathering and under direct ultraviolet (UV) radiation. The extent of photodegradation was assessed by FTIR spectroscopy, percentage weight loss, surface analysis, average molecular weights and polydispersity indices. FTIR analysis confirms the photodegradable mechanisms of the copolymer films as Norrish Type I, Norrish Type II and photo-oxidation. Extreme weight loss was observed at outdoor weathering with 36.76% weight loss for 75% (w/w) cinnamaldehyde (natural-from cinnamon oil) incorporated copolymer (Poly(St-co-N-Cin)), and 45.58% weight loss for 75% (w/w) cinnamaldehyde (synthetic) incorporated copolymer (Poly(St-co-S-Cin)) with respect to 2.5% weight loss for polystyrene (PS) homopolymer for the period of 100 days. The average molecular weights of Poly(St-co-Cin) copolymers after outdoor weathering have drastically reduced compared to polystyrene. Scanning Electron Microscope (SEM) images clearly depict the fracture generation on Poly(St-co-Cin) films upon degradation. Embrittlement and color developments of the copolymer films with aging were noticeably evident. Furthermore, copolymers were tested positive for antibacterial activity against both gram negative and gram positive bacteria.

通过自由基聚合进行苯乙烯（St）和肉桂油与合成肉桂醛中肉桂醛（Cin）的不同比例共聚，并通过傅里叶变换红外光谱（FTIR），热重分析（TGA），差示扫描量热法进行了表征（DSC）分析和凝胶渗透色谱（GPC）。已研究了在室外风化条件下和在直接紫外线（UV）辐射下，肉桂醛共混共聚物（Poly（St-co-Cin））薄膜的光降解作用。通过FTIR光谱，重量损失百分比，表面分析，平均分子量和多分散性指数评估了光降解的程度。FTIR分析证实了共聚物膜的光降解机理，如I型Norrish，II型Norrish和光氧化。在室外风化条件下观察到极重的重量损失，其中75％（w / w）肉桂醛（天然肉桂油）掺入的共聚物（聚（St-co-N-Cin））的重量损失为36.76％，而75％（重量/重量）肉桂酸酯（聚（St-co-N-Cin））的重量损失为相对于聚苯乙烯（PS）均聚物的2.5％重量损失100天，含75％（w / w）肉桂醛（合成）共聚物（聚（St-co-S-Cin））。与聚苯乙烯相比，室外风化后的聚（St-co-Cin）共聚物的平均分子量已大大降低。扫描电子显微镜（SEM）图像清楚地显示了降解后聚（St-co-Cin）薄膜上的断裂产生。随着时间的过去，共聚物膜的脆化和显色是明显的。此外，